Mechanism for converting rotary into reciprocatory motion



I R. GOLDSC HMIDT. MECHANISM FOR CONVERTING ROTARY INTO RECIPROCATORY MOTION.

APPLICATION man IAN-29. 192:. I 1 5 335 Pzmnted May 9, 1922.

Fla!

urrs!) STATES PATENT OFFICE.

BUDOLF GOLDSCHMIDT, BERLIN, GERMANY, ASSIGNOR TO DET TEKNISKE FORSOGSAKTIESELSKAB, OF ORDRUP, CHARLOTTENLUND, DENMARK, A.

COMPANY OF DENMARK.

MECHANISM FOR CONVERTING ROTARY INTO RECIPROCATORY MOT'IONp To all whom it may concern:

I Be it known that-I, Rononr GoLDsoHMID'r, a citizen of Germany, and a resident of Berlin, Germany, have invented certain new and useful Improvements in Mechanism for Converting Rotary into Beciprocatory Motion, of which the following is a specification.

This invention relates to mechanism for converting rotary into-reciprocatory motion wherein a reciprocatory member is reciprocated by a centrifugal weight or weights pivoted to the member.

One of the objects of the present invention is to overcome the necessity of employing heavy centrifugal weights rotating at great radius.

According to the'present invention the arm carrying the centrifugal weight is jointed so that the outer part of the arm carrying the weight is capable of angular movement in relation to the inner part of the arm.

In order that the invention may be more clearly understood reference is hereinafter made to the accompanying drawings where- Fig. 1 is a side view of one form of the improved mechanism.

Fig. 2 is a plan view thereof.

Fig. 3 is a view corresponding to Fig. 1 illustrating a modified form of mechanism after the main shaft has been rotated through ninety degrees.

The invention is illustrated on the drawings as applied to the reciprocation of a member 1 movable between guides 2 in a horizontal path.

Rotatably journaled in the member 1 is a cross shaft 3 to which are fixed one or more arms 4 rotatably supporting on their outer ends a pin or shaft 5 upon which is mounted an arm 6 carrying a weight 7. The arm 6 is rotated either through gearing (not shown) or directly from a chain wheel 8 around which is trained a chain 9 which also passes over a chain wheel 10 mounted on the member 1. It will be seen that the arm 4 rotates about the axis of the cross shaft 3. as its centre and that the arm 4 is jointed to the arm 6 which maybe adapted to rotate about Specification of Letters Patent.

Patented May 9, 1922.

Application filed January 29, 1921. Serial No. 441,097.

ing may be replaced by any other suitable form of driving mechanism and that the chain wheel 8 may be adapted to drive the arm 6 at any desired angular velocity through gearing (not shown). The relative positions of the arms 4 and 6 during rotation of the arm 4 will depend upon the angular velocity of the arm 4 about its centre 3 relative to the angular velocity of the arm 6 about its centre The centrifugal action of the weight 7 will vary according to the variation in the relative positions of the two arms. For example, if the arm 6 were driven by the chain wheel 8 by gearing (not shown) so that the arm 6 made two revolutions about its centre 5 for each revolution of the arm 4 about its centre 3, then when the arm 4 had rotated through 90 from the position shown in Fig. 1, the parts would occupy the position shown in Fig.- 3 where the centrifugal action of the weight 7 is smaller than the centrifugal fore of the weight 7 in the position shown in Fig. 1. In the position illustrated in Fig. 1, however, the centrifugal action of the weight 7 is greater than if it were fixed to an un divided arm of a length equal to the distance between the centres of'the cross shaft 3 and weight 7, this being due to the additional angular velocity of the arm 6.

It will be understood that the motion of the weights 7 may be readily varied by mounting the chain wheels 10 so as to be capable of rotation on the cross shaft 3 and rotating the chain wheels 10 by any suitable mechanism.

The cross shaft 3 may be rotated in any convenient manner as for example by flexible shafting from aprime mover] The gyrations of the centrifugal weight or weights 7 will effect reciprocation of the member 1 within the guides 2 and in order to obtain a balancing effect in the system, the member 1 may be fitted with any desired number of rotatably mounted arms 4 and 6 and weights 7, but for the sake of clearness only two such rotatable arms and weights have been illustrated on the drawing.

The foregoing mechanism is applicable to any form of reciprocatory member such as that shown on the drawings and is particularly applicable to reciprocatory members such as those described in the specification accom mnying my co-pending patent applications Serial Nos. 436,206, filed 10th Jan. 1921, 436513 tiled 11th Jan. 1921 and 441099 filed 29th Jan. 1921.

Claims.

1. Mechanism for converting rotary into reciprocatory motion comprising a reciprocatory member, a jointed arm pivoted to said member and a Weight mounted on the outer fiart of said jointed arm.

2. echanism for converting rotary into reciprocatory motion, comprising a reciprocatory member, an arm pivotally mounted thereon, means for rotating said arm and a centrifugal Weight jointed to said arm and capable of angular movement in relation thereto.

3. Mechanism for converting rotary into reciprocatory motion comprising a recipro-' catory member, a rotary arm pivotally mounted on said member, an outer arm pivotally mounted at the free end of said arm, a weight carried by said outer arm, means for rotating said rotary arm and means for rotating said outer arm.

4. Mechanism for converting rotary 'into 'l'eciprocatory motion, comprising a reciprocatory member, horizontal guides for said member, a driven shaft ournaled in said member, an inner arm fixed at one end to said shaft. an outer arm journaled at the free end of said inner arm, a weight mounted misses on said outer arm and means for rotating said outer arm.

5. Mechanism for converting rotary into. reciprocatory motion, comprising a reciprocatory member, an inner arm pivotally said shaft, an outer arm journaled at the free end of said inner arm, a weight mounted on said outer arm, a gear wheel mounted at the free end of said inner arm and rotatable with said outer arm and transmission gearing from said reciprocatory member to said gear wheel.

7. Mechanism for converting rotary into reciprocator motion, comprising a reciprocatory mem er, a plurality of jointed arms pivotally mounted on said reciprocatory member and a weight mounted on the outer part of each of said jointed arms.

In testimony whereof I hereunto afiix my signature.

RUDOLF GOLDSCHMIDT. 

